CN104434395A - Device capable of increasing light changing speed of protective cover of electric welding machine and prolonging service life of light valve - Google Patents
Device capable of increasing light changing speed of protective cover of electric welding machine and prolonging service life of light valve Download PDFInfo
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- CN104434395A CN104434395A CN201410608111.0A CN201410608111A CN104434395A CN 104434395 A CN104434395 A CN 104434395A CN 201410608111 A CN201410608111 A CN 201410608111A CN 104434395 A CN104434395 A CN 104434395A
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Abstract
The invention provides a device capable of increasing the light changing speed of a protective cover of an electric welding machine and prolonging the service life of a light valve. The device capable of increasing the light changing speed of the protective cover of the electric welding machine and prolonging the service life of the light valve comprises a protective cover shell, and a liquid crystal glasses lens (light valve) capable of achieving photoelectric control color changing and an operating circuit which is electrically connected with the liquid crystal glasses lens are mounted in the protective cover shell. The device is characterized in that the operating circuit comprises a pulse circuit, a preheat circuit, a based voltage circuit, a solar charging circuit and a boosted circuit which are electrically connected. The device capable of increasing the light changing speed of the protective cover of the electric welding machine and prolonging the service life of the light valve enables the light changing speed of the protective cover of the electric welding machine to be shortened to be 0.1 millisecond from the original 40-100 milliseconds and enables the service life of the liquid crystal glasses lens (light valve) to be prolonged to be 50000 hours from the original 2500 hours, which is 20 times the service life of that of an existing protective cover.
Description
Technical field
The invention discloses a kind of protective hood of electric welding machine that improves become ray velocity and extend the device in light valve life-span, belong to technical field of electronic products, be concretely with for the change ray velocity of automatic beam change type protective hood of electric welding machine and the device in light valve life-span relevant.
Background technology
Protective hood of electric welding machine is the product that welding profession is conventional, and traditional protective hood of electric welding machine is Handheld protective cover, and this hand-held protective hood of electric welding machine comprises protected enclosure, and protected enclosure is provided with dark colour eyeglass.When using this hand-held protective hood of electric welding machine welding work pieces, operative employee is needed to arrest protective cover, a hand-held welding gun welding work pieces on the other hand, because the eyeglass of protective cover can not become light, often a welding point will be removed protective cover and check welding situation, can not continuous welding, can only weld by segmentum intercalaris, therefore welding efficiency is low, commissure is rough.Afterwards market was proposed automatic beam change type protective hood of electric welding machine, this automatic beam change type protective hood of electric welding machine comprises protective cover shell, be provided with liquid crystal lens (light valve) and the DC power-supply circuit of photo-electric control variable color in the enclosure, liquid crystal lens (light valve) is electrically connected with DC power-supply circuit.This automatic beam change type protective hood of electric welding machine is the upgrading products of hand-held protective hood of electric welding machine, its liquid crystal lens (light valve) can change light transmittance according to the bright degree of commissure under the control of DC circuit, so use this automatic beam change type protective hood of electric welding machine to change traditional mode of operation by Welder on the other hand protective cover, a hand-held welding gun, an original often welding solder joint is needed to remove face shield and is transformed into continuous welding, improve welding efficiency.But this automatic beam change type protective hood of electric welding machine in use has following defect: one be liquid crystal lens (light valve) for becoming light is by DC power supply, and liquid crystal lens (light valve) is not suitable for dc voltage operation, liquid crystal lens (light valve) adding for a long time DC voltage easily causes liquid crystal lens (light valve) direct current aging, greatly shortens the service life of liquid crystal lens (light valve); Long-time continuous welding in addition, DC power supply makes liquid crystal (light valve) can not get reliable reset, and liquid crystal lens (light valve) occurs alabastrine black speck above, badly influences the visual effect of Welder.Two is that change ray velocity is slow, participate in liquid crystal (light valve) response speed of change light generally at about 10 milliseconds, add the time delay of the peripheral circuit for its power supply, make the change ray velocity of protective hood of electric welding machine between 40 milliseconds to 100 milliseconds, be longer than far away and in the world the requirement that ray velocity is 1 millisecond become to protective hood of electric welding machine.
Summary of the invention
The object of the present invention is to provide a kind of device improving protective hood of electric welding machine and become ray velocity and extend the light valve life-span, this raising protective hood of electric welding machine becomes ray velocity and extends the device in light valve life-span can make the change ray velocity of protective hood of electric welding machine foreshorten to 0.1 millisecond by original 40 milliseconds ~ 100 milliseconds, the service life of liquid crystal lens (light valve) can extend to 50000 hours by original 2500 hours, was 20 times of existing protective cover.
Following technical scheme is taken for realizing object of the present invention:
A kind of device improving protective hood of electric welding machine and become ray velocity and extend the light valve life-span, the device that this raising protective hood of electric welding machine becomes ray velocity and prolongation light valve life-span comprises protected enclosure, the liquid crystal lens (light valve) of photo-electric control variable color and the operating circuit of electrical connection are installed in protected enclosure, it is characterized in that described operating circuit comprises the impulse circuit of electrical connection, preheat circuit, solar charging circuit and booster circuit.
Described impulse circuit comprises the oscillating circuit of light sensitive diode D4, the audion q3 of electrical connection, audion q4 and peripheral original paper composition thereof, the on-off circuit being formed by transistor VT1 and peripheral original paper thereof, be connected with oscillating circuit.
Described preheat circuit comprises amplifier U1A, electric capacity C1, electric capacity C2, the electric capacity C3 of electrical connection, resistance R1, resistance R3, resistance R7, resistance R8, resistance R9, diode D2, diode D3.
Described booster circuit comprises electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C12, electric capacity C15, electric capacity C16, the electric capacity C17 of electrical connection, resistance R13, resistance R14 and diode D5, diode D6, diode D7, diode D8.
Feature of the present invention is that structure simply, easily realizes; Its remarkable advantage improves protective hood of electric welding machine to become ray velocity, extends the service life of liquid crystal (light valve).
Accompanying drawing explanation
Technical characteristic of the present invention is further described below in conjunction with accompanying drawing:
The electric theory structure schematic diagram of Fig. 1, one embodiment of the invention;
Fig. 2, be Fig. 1 of the present invention export timing chart.
In figure: A, solar panel B, button cell C, liquid crystal lens (light valve).
Detailed description of the invention
As shown in Figure 1, light sensitive diode D4, audion q3, audion q4, resistance R10, resistance R11, resistance R12, resistance R15, resistance R16, resistance R17, electric capacity C11, electric capacity C13, electric capacity C14, diode VD1 constitute impulse circuit of the present invention, and transistor VT1, electric capacity C14, resistance R15 constitute on-off circuit of the present invention.The base stage of transistor VT1 is connected with the colelctor electrode of audion q3, and the colelctor electrode of transistor VT1 exports integrated package CD4060 to, and by integrated package CD4060 to booster circuit, booster circuit exports liquid crystal lens (light valve) to; In figure is U1A operational amplifier, operational amplifier U1A and electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R3, resistance R7, resistance R8, resistance R9, diode D2, diode D3 connect, composition preheat circuit, for liquid crystal lens (light valve) provides standby voltage.CD4060 in figure is integrated package, integrated package CD4060 and electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C12, electric capacity C15, electric capacity C16, electric capacity C17, the booster circuit that resistance R13, resistance R14 and diode D5, diode D6, diode D7, diode D8 form and on-off circuit electrical connection.W1 in figure is adjustable resistance, and adjustment adjustable resistance W1 can adjust the sensitivity of circuit of the present invention.
After electro-welding arc is irradiated to light sensitive diode D4, audion q3 conducting, the conducting of audion q3 makes audion VT1 conducting, and the colelctor electrode of audion VT1 exports high level; Audion q4 conducting simultaneously, after audion q4 conducting, makes audion q3 end, and audion q3 cut-off makes again audion VT1 end, the colelctor electrode output low level of VT1; Export first pulse at the colelctor electrode of audion VT1 like this, this pulse exports booster circuit to through integrated package CD4060, is then delivered to liquid crystal lens (light valve) by booster circuit; After audion VT1 ends, light sensitive diode D4 provides again the triggering signal of telecommunication, makes circuit repeat above-mentioned work.
Electric capacity C11 in circuit is filter capacitor, works as the noise signal of filtering light sensitive diode D4, and electric capacity C13 and resistance R16 forms RC filter network; In order to improve the property at high and low temperature of circuit, be connected to the negative-feedback circuit of VD1 and R17 composition at the emitter stage of audion q4; The wherein sensitivity of regulator potentiometer W1 adjustable circuit, when outdoor light too strong or too weak time by regulating W1 to carry out the sensitivity of regulating circuit; Potentiometer W2 and electric capacity C14 forms discharge and recharge network, and regulator potentiometer W2 can regulate light valve to return the time of on state of by dark-state.
Electric welder's helmet is low-power consumption product, and in order to improve the button cell life-span, reduce the low consumption circuit that power consumption present invention employs audion Q2 and P channel mosfet pipe Q1 composition, specific works principle is as follows:
When electric welder's helmet does not use, solar panel dead electricity, audion Q2 base stage is moved to low level by resistance R6, cause audion Q2 to end, P channel mosfet pipe Q1 turns off, now whole circuit dead electricity, system is in low power consumpting state, and the overall current of circuit is lower than 0.1UA; When solar panel obtain electric after, audion Q2 opens, thus P channel mosfet pipe is opened, circuit obtains electric, diode D1 conducting simultaneously, now solar panel A can charge to button cell B while powering to circuit, improves the service life of button cell B.
The impulse wave that the present invention improves the device employing alternation that protective hood of electric welding machine becomes ray velocity and extends the light valve life-span is liquid crystal lens (light valve) power supply, make liquid crystal lens (light valve) not easily aging, liquid crystal lens (light valve) can extend to 50000 hours by original 2500 hours with the life-span, be 20 times of existing liquid crystal protective shield; Adopting preheating to add booster circuit the response speed of light valve is shortened to 0.1 millisecond, greatly improve the response speed of light valve, is become ray velocity into 1 millisecond to protective hood of electric welding machine in the world to require 1/10th.
The specific works principle of circuit is as follows:
Operational amplifier U1A when electric welding machine does not have a starting the arc, electric capacity C1, C2, C3 resistance R1, R3, R7, R8, R9 diode D2, D3 forms Wen and shakes bridge, peak-to-peak value is 3-4VPP, a standby voltage is provided to light valve, light valve is constant light under this voltage, when the electric welding machine starting the arc, by integrated package CD4060, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C12, electric capacity C15 electric capacity C16, electric capacity C17, resistance R13, resistance R14 and diode D5, diode D6, diode D7, the booster circuit that diode D8 forms boosts immediately, booster voltage is 4 times (12V-13V) of button cell B voltage, this voltage superposition is on light valve, thus make light valve blackening, the eyes of protection operator.
Claims (4)
1. the device improving protective hood of electric welding machine and become ray velocity and extend the light valve life-span, the device that this raising protective hood of electric welding machine becomes ray velocity and prolongation light valve life-span comprises protected enclosure, the liquid crystal lens (light valve) of photo-electric control variable color and the operating circuit of electrical connection are installed in protected enclosure, it is characterized in that: described operating circuit comprises the impulse circuit of electrical connection, preheat circuit, base volt circuit, solar charging circuit and booster circuit.
2. become ray velocity by raising protective hood of electric welding machine according to claim 1 and extend the device in light valve life-span, it is characterized in that: described impulse circuit comprises the oscillating circuit of light sensitive diode D4, the audion q3 of electrical connection, audion q4 and peripheral original paper composition thereof, the on-off circuit being formed by transistor VT1 and peripheral original paper thereof, be connected with oscillating circuit.
3. become ray velocity by raising protective hood of electric welding machine according to claim 1 and extend the device in light valve life-span, it is characterized in that: described preheat circuit comprises the amplifier U1A of electrical connection, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R3, resistance R7, resistance R8, resistance R9, diode D2, diode D3.
4. become ray velocity by raising protective hood of electric welding machine according to claim 1 and extend the device in light valve life-span, it is characterized in that: described booster circuit comprises electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C12, electric capacity C15, electric capacity C16, the electric capacity C17 of electrical connection, resistance R13, resistance R14 and diode D5, diode D6, diode D7, diode D8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410608111.0A CN104434395B (en) | 2014-12-26 | 2014-12-26 | Device capable of increasing light changing speed of protective cover of electric welding machine and prolonging service life of light valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410608111.0A CN104434395B (en) | 2014-12-26 | 2014-12-26 | Device capable of increasing light changing speed of protective cover of electric welding machine and prolonging service life of light valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104434395A true CN104434395A (en) | 2015-03-25 |
| CN104434395B CN104434395B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410608111.0A Expired - Fee Related CN104434395B (en) | 2014-12-26 | 2014-12-26 | Device capable of increasing light changing speed of protective cover of electric welding machine and prolonging service life of light valve |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0027518A1 (en) * | 1979-09-06 | 1981-04-29 | Gor-Vue Corporation | Lens assembly for a welding helmet for use in sunlight conditions and in a welding helmet the combination of a circuit including a photodetector |
| CN2151732Y (en) * | 1993-01-12 | 1994-01-05 | 陈柏兴 | Blackness adjustable electronic auto welding colour filter glass |
| US6070264A (en) * | 1999-04-09 | 2000-06-06 | Jackson Products, Inc. | Welding helmet having auto-darkening and manually adjustable lens shade control |
| CN2717416Y (en) * | 2003-11-03 | 2005-08-17 | 蒋群 | Electric weldig goggles |
| CN201058071Y (en) * | 2006-11-08 | 2008-05-14 | 江西亨泰科技有限公司 | Control circuit for full digital type automatic light-changing welding face mask |
| CN201139682Y (en) * | 2007-11-09 | 2008-10-29 | 中原工学院 | Microcontroller controlled eye protector for welder automatically changing light |
| CN104116590A (en) * | 2013-04-27 | 2014-10-29 | 李骥超 | Circuit implementation method used for lens group dimming control in welding mask |
-
2014
- 2014-12-26 CN CN201410608111.0A patent/CN104434395B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0027518A1 (en) * | 1979-09-06 | 1981-04-29 | Gor-Vue Corporation | Lens assembly for a welding helmet for use in sunlight conditions and in a welding helmet the combination of a circuit including a photodetector |
| CN2151732Y (en) * | 1993-01-12 | 1994-01-05 | 陈柏兴 | Blackness adjustable electronic auto welding colour filter glass |
| US6070264A (en) * | 1999-04-09 | 2000-06-06 | Jackson Products, Inc. | Welding helmet having auto-darkening and manually adjustable lens shade control |
| CN2717416Y (en) * | 2003-11-03 | 2005-08-17 | 蒋群 | Electric weldig goggles |
| CN201058071Y (en) * | 2006-11-08 | 2008-05-14 | 江西亨泰科技有限公司 | Control circuit for full digital type automatic light-changing welding face mask |
| CN201139682Y (en) * | 2007-11-09 | 2008-10-29 | 中原工学院 | Microcontroller controlled eye protector for welder automatically changing light |
| CN104116590A (en) * | 2013-04-27 | 2014-10-29 | 李骥超 | Circuit implementation method used for lens group dimming control in welding mask |
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| CN104434395B (en) | 2017-01-11 |
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Granted publication date: 20170111 Termination date: 20171226 |